java 读写 ini 文件

package com.ini;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

/**
* 这是个配置文件操作类，用来读取和设置ini配置文件
*
* @author 由月
* @version 2004-08-18
*/

public class ConfigurationFile {
/**
* 从ini配置文件中读取变量的值
*
* @param file
* 配置文件的路径
* @param section
* 要获取的变量所在段名称
* @param variable
* 要获取的变量名称
* @param defaultValue
* 变量名称不存在时的默认值
* @return 变量的值
* @throws IOException
* 抛出文件操作可能出现的io异常
*/
public static String getProfileString(String file, String section, String variable, String defaultValue) throws IOException {
String strLine, value = "";
BufferedReader bufferedReader = new BufferedReader(new FileReader(file));
boolean isInSection = false;
try {
while ((strLine = bufferedReader.readLine()) != null) {
strLine = strLine.trim();
strLine = strLine.split("[;]")[0];
Pattern p;
Matcher m;
p = Pattern.compile("//[//s*.*//s*//]");
m = p.matcher((strLine));
if (m.matches()) {
p = Pattern.compile("//[//s*" + section + "//s*//]");
m = p.matcher(strLine);
if (m.matches()) {
isInSection = true;
} else {
isInSection = false;
}
}
if (isInSection == true) {
strLine = strLine.trim();
String[] strArray = strLine.split("=");
if (strArray.length == 1) {
value = strArray[0].trim();
if (value.equalsIgnoreCase(variable)) {
value = "";
return value;
}
} else if (strArray.length == 2) {
value = strArray[0].trim();
if (value.equalsIgnoreCase(variable)) {
value = strArray[1].trim();
return value;
}
} else if (strArray.length > 2) {
value = strArray[0].trim();
if (value.equalsIgnoreCase(variable)) {
value = strLine.substring(strLine.indexOf("=") + 1).trim();
return value;
}
}
}
}
} finally {
bufferedReader.close();
}
return defaultValue;
}

/**
* 修改ini配置文件中变量的值
*
* @param file
* 配置文件的路径
* @param section
* 要修改的变量所在段名称
* @param variable
* 要修改的变量名称
* @param value
* 变量的新值
* @throws IOException
* 抛出文件操作可能出现的io异常
*/
public static boolean setProfileString(String file, String section, String variable, String value) throws IOException {
String fileContent, allLine, strLine, newLine, remarkStr;
String getValue;
BufferedReader bufferedReader = new BufferedReader(new FileReader(file));
boolean isInSection = false;
fileContent = "";
try {

while ((allLine = bufferedReader.readLine()) != null) {
allLine = allLine.trim();
if (allLine.split("[;]").length > 1)
remarkStr = ";" + allLine.split(";")[1];
else
remarkStr = "";
strLine = allLine.split(";")[0];
Pattern p;
Matcher m;
p = Pattern.compile("//[//s*.*//s*//]");
m = p.matcher((strLine));
if (m.matches()) {
p = Pattern.compile("//[//s*" + section + "//s*//]");
m = p.matcher(strLine);
if (m.matches()) {
isInSection = true;
} else {
isInSection = false;
}
}
if (isInSection == true) {
strLine = strLine.trim();
String[] strArray = strLine.split("=");
getValue = strArray[0].trim();
if (getValue.equalsIgnoreCase(variable)) {
newLine = getValue + " = " + value + " " + remarkStr;
fileContent += newLine + "/r/n";
while ((allLine = bufferedReader.readLine()) != null) {
fileContent += allLine + "/r/n";
}
bufferedReader.close();
BufferedWriter bufferedWriter = new BufferedWriter(new FileWriter(file, false));
bufferedWriter.write(fileContent);
bufferedWriter.flush();
bufferedWriter.close();

return true;
}
}
fileContent += allLine + "/r/n";
}
} catch (IOException ex) {
throw ex;
} finally {
bufferedReader.close();
}
return false;
}

/**
* 程序测试
*/
public static void main(String[] args) {
try {
String value = ConfigurationFile.getProfileString("d:/1.ini", "Settings", "SampSize", "abc");
System.out.println(value);
String defaultValue = ConfigurationFile.getProfileString("d:/1.ini", "Settings", "SampSizeddd", "abc");
System.out.println(defaultValue);
System.out.println(ConfigurationFile.setProfileString("d:/1.ini", "Settings", "SampSize", "111"));
} catch (IOException e) {
System.out.println(e.toString());
}
}
}